Conan_Usage.md

@@ -30,6 +30,12 @@ cd <build directory>
 conan install --build=missing -s compiler="Visual Studio" -s compiler.version=15 <relative path to source directory>
 cmake <relative path to source directory>
 ```
+* If you want to use the Visual Studio **Release/Debug**-Switch, use cmake_multi
+```
+conan install --build=missing -s compiler="Visual Studio" -s compiler.version=15 -g cmake_multi -s build_type=Release -s compiler.runtime=MD ..
+conan install --build=missing -s compiler="Visual Studio" -s compiler.version=15 -g cmake_multi -s build_type=Debug -s compiler.runtime=MDd ..
+```
+
 * **Troubleshooting:**
  * Windows Universal CRT SDK in the Visual Studio 2017 Installer apparently has to be ticked otherwise an error with missing ctypes.h occurs during building glew.